clang/test/SemaCXX/align-x86.cpp

   1 // RUN: %clang_cc1 -std=c++11 -triple i386-apple-darwin9 -fsyntax-only -verify %s
   2 // expected-no-diagnostics
   3
   4 using size_t = decltype(sizeof(0));
   5
   6 struct complex_double {
   7   double real;
   8   double imag;
   9 };
  10
  11 template <typename T, size_t ABI, size_t Preferred>
  12 struct check_alignment {
  13   using type = T;
  14   static type value;
  15
  16   static_assert(__alignof__(value) == Preferred, "__alignof__(value) != Preferred");
  17   static_assert(__alignof__(type) == Preferred, "__alignof__(type) != Preferred");
  18   static_assert(alignof(type) == ABI, "alignof(type) != ABI");
  19 };
  20
  21 // PR3433
  22 template struct check_alignment<double, 4, 8>;
  23 template struct check_alignment<long long, 4, 8>;
  24 template struct check_alignment<unsigned long long, 4, 8>;
  25 template struct check_alignment<complex_double, 4, 4>;
  26
  27 // PR6362
  28 struct __attribute__((packed))
  29 packed_struct {
  30   unsigned int a;
  31 } g_packedstruct;
  32 template struct check_alignment<packed_struct, 1, 1>;
  33 static_assert(__alignof__(g_packedstruct.a) == 1, "__alignof__(packed_struct.member) != 1");
  34
  35 template struct check_alignment<double[3], 4, 8>;
  36
  37 enum big_enum { x = 18446744073709551615ULL };
  38 template struct check_alignment<big_enum, 4, 8>;
  39
  40 // PR5637
  41
  42 #define ALIGNED(x) __attribute__((aligned(x)))
  43
  44 typedef ALIGNED(2) struct {
  45   char a[3];
  46 } aligned_before_struct;
  47
  48 static_assert(sizeof(aligned_before_struct)       == 3, "");
  49 static_assert(sizeof(aligned_before_struct[1])    == 4, "");
  50 static_assert(sizeof(aligned_before_struct[2])    == 6, "");
  51 static_assert(sizeof(aligned_before_struct[2][1]) == 8, "");
  52 static_assert(sizeof(aligned_before_struct[1][2]) == 6, "");
  53
  54 typedef struct ALIGNED(2) {
  55   char a[3];
  56 } aligned_after_struct;
  57
  58 static_assert(sizeof(aligned_after_struct)       == 4, "");
  59 static_assert(sizeof(aligned_after_struct[1])    == 4, "");
  60 static_assert(sizeof(aligned_after_struct[2])    == 8, "");
  61 static_assert(sizeof(aligned_after_struct[2][1]) == 8, "");
  62 static_assert(sizeof(aligned_after_struct[1][2]) == 8, "");